Nearing the end of Luc's sci-fi film Lucy, she says, "I'll download my knowledge...". Then, at the very end, her knowledge is saved to a hard drive. My question is, what format would it be in, and how could it possibly be read by a computer so lacking in computing power compared to her "computer form"?
What format would the data be in?
At this point, Lucy has immense knowledge of the universe, more than mankind has ever attained. The fact that the sum of this knowledge can be stored in a device so small in size implies that the data storage format she uses is much more efficient than anything we are capable of today. This idea is also suggested by the otherworldly visual effect applied to the drive in question.
How could it possibly be read by a computer so lacking in computing power?
This is not addressed in the film, but again, given Lucy's vast knowledge of the workings of the universe by the time she creates this drive, she might well have bestowed upon the device the ability to convert its data to a familiar format that can be accessed by conventional computers (e.g. by providing a USB port).